put in new motor now tiptronic dead

[berner1]

Hey guys, I just got done putting a new to the car motor in my 2001 B5 S4. I got everything fired up and the car started up fantastic. It sounds like it runs smooth. Anyway I went to jump in it and take it for a spin and nothing!!! No reverse no drive no gear in tip. I checked the tranny fluid through the fill hole and there is plenty of fluid in the tranny. when I pulled the tranny off the old block the torque converter obviously lost some fluid as did the tranny cooler too. when bolted the tranny to the new block I heard kind of a "bong" sound.... lol when it was almost solid to the block. Like I said everything felt right and went smooth besides that noise I heard. I got everything up and running and no transmission at all. I know this transmission is a sealed unit but am I missing something or is my torque converter shot. there is no bleeder hole or anyting like that right? I just don't want to pull the motor again. Im pretty beat doing this thing but I got to get it running..... any help would be super cool. Thanks Guys!!!



Ben

[S4tech2]

Just for shits, did you plug the electrical connector into the trans? I have forgotten that once or twice.

[berner1]

Yep I Triple checked that. There is the two plugs on the bottom and the speed sensor magnet like plug and one right by that right. That's it I think.

[das4]

what does your gear selector say on the DIS? does it change when you switch gears? have you double checked the the linkage wasn't/isn't disconnected? does the selector have that notchy feeling as it did before or does it glide from park through the gears easily?

[belittle]

Sounds like you didn't get the torque converter "set" in correctly. There are 2 sets of splines that have to be clicked into. That bonk you heard was the sound of a new transmission or a fully disassembly of the trans to replace the broken front oil pump from a forced converter install.

[berner1]

Yeah the linkage is hooked up. It feels like the gears are there like before just won't go into gear.... so belittle, you think the converter is shot?

[sjmelling]

Sounds like you didn't get the torque converter "set" in correctly. There are 2 sets of splines that have to be clicked into. That bonk you heard was the sound of a new transmission or a fully disassembly of the trans to replace the broken front oil pump from a forced converter install.

This is my initial thought as well. If this is the case. You are looking at a several hundred dollar repair once the trans is out. The mechanic that did the TC upgrade on my car sheared off the splines of the trans fluid pump. Car started and idled fine but no movement whatsoever.

[sjmelling]

Yeah the linkage is hooked up. It feels like the gears are there like before just won't go into gear.... so belittle, you think the converter is shot?

Not the converter, just the trans fluid pump. Just my thoughts though.

[Protection]

Did you measure the distance between the torque converter mounting holes and housing? It can be a little tricky getting the tc seated properly. Measuring, is the best way to confirm it is seated properly. If seated correctly the distance between TC mounting holes and edge of tranny case is per Bentley, "at least 23 mm"..."if not inserted completely, the distance will be approximately 11mm"


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[DieselElectric]

What the two guys above said.

When installing a converter you need to spin it while pushing, and you will know when it fully seats in.

Also, after your assembly is together you should be able to rotate the torque converter to line up the holes in the flywheel without much effort. If the torque converter had pressure on it during assembly, then as mentioned above, your trans oil pump is likely shot.

[88ninety9]

When I swapped my motors, I just unbolted the flex plate. No fluid loss, no tc finaggling, just bolted the flex plate to the new motor and spun the motor to get to the flex plate bolts through the starter hole. Was a piece of cake. Unfortunately, looks like you'll be pulling them apart again

[seanf86]

why would you leave the torque converter attached to the flex plate and separate the trans and engine? That sounds like a recipe for disaster. Sounds like a broken front pump like everyone else said.

[DieselElectric]

When I swapped my motors, I just unbolted the flex plate. No fluid loss, no tc finaggling, just bolted the flex plate to the new motor and spun the motor to get to the flex plate bolts through the starter hole. Was a piece of cake. Unfortunately, looks like you'll be pulling them apart again

That is how you are supposed to do it. Only time I haven't bothered to separate the TC from the flywheel was when I was replacing the old trans.

[DieselElectric]

Mind you, I'm not speaking anything S4 specific as I've never dealt with an Auto S4, but this rule applies to every Torque converter equipped auto trans ever made.

[berner1]

I bet that's what it is then. Sounds about exactly what is happening. I'm just used to pulling apart old chevys, this is my first audi rebuild. Not used to these fragile little things. I'll get it done just make alot more work for myself in the process I guess....... dang it, wouldn't be a big deal if anti freeze and power steering fluid weren't so dang expensive! I'm pulling it back apart Saturday and I'll check it out. Is it going to be obvious it's the fluid pump? Pretty hard to change or is it easy once I'm in there? Thanks a bunch guys for your thoughts on this, nice to have a community that knows their shit.

[berner1]

Got the motor pulled and the tranny split again. I can't see anything that would be bad. All the splines on the tranny side look good. Is there anyway to check and see if a torque converter is bad? Something is obviously very wrong and I don't know where to go at this point. Any ideas?

[berner1]

well dang I hope there were some ways to check this stuff. If I spin the transmission oil pump shaft with a drill and the oil pumps out of the lines obviously the torque converter would be bad and if not the pump is bad. has anyone on here changed a transmission oil pump? special tools or just a pain? looks like it should be straight forward being right behind the torque converter. anyway I hope someone knows.

[belittle]

When you take apart the transmission, unfortunately the last item that is removed is the oil pump as almost everything is tied into the pump. Speaking from experience, your going to need a new transmission. I would assume a new oil pump from Audi is either not available or crazy expensive, should be able to pick up a used transmission for 400-800 easy.

[berner1]

Well after 5 weeks and pulling the motor twice I got her on the road again. Yes I messed up the tranny when I bolted it back together so I found a used tranny for 650 and everything works great. What a task. So happy to be driving her again. Thanks again for the help guys.

[sjmelling]

Glad to hear it!